An article published in “The Astrophysical Journal” reports a study on Abell 1758, a quadruple galaxy cluster formed by two pairs that are in different merger phases. A team of researchers used NASA’s Chandra X-ray Observatory and other telescopes to map this gigantic group of galaxies. Each pair is made up of hundreds of galaxies embedded in enormous amounts of hot gas and invisible dark matter. These accurate observations will help to better assess how long it will take for mergers to occur in the two pairs of clusters, which in the future will in turn merge to form a super cluster that will be one of the most massive objects in the universe.